True. The problem for the defence though, IMO, is that if it was truly accidental, then she and her kids, and probably her dog too, would have also been poisoned.
She ate about the same amount of the 'accidentally poisoned' meal as Gail did. Even if EP had stuffed herself with cake and brought it back up later----that still left several hours for the Death Caps to enter her blood stream and her digestive track. And begin doing major damage.
I don't think there was any convincing evidence shown that EP suffered any health setbacks after she ate her meal. The only 'evidence' of her being unwell is her own description.
If she truly fed her children leftover meat that had been cooking in the oven with Death Cap paste on top of it, scraping off the mushrooms would not have prevented them from severe illness.
So 'accidental' does not ring true for me. If she thought that meal was 'safe', her Labrador would have been given those leftover meat scraps that night, IMO.
It is just too hard for me to believe that Death Caps were accidentally added to that elegant meal, and somehow the ONLY people who were deathly ill were her invited guests.